1. Make sure you vehicle is in proper working order (especially your lights): These things can provide the one reason for the police to stop you even if you are driving properly in all other ways.
2. Comply with the Law while driving, but do not drive too cautiously: Stop at stop signs, signal with you change lanes, signal when you turn. All of the above are what is expected typically from any driver. But do not drive slowly in areas where it does not make any sense to drive that slow, or sudden braking.
Remember the best prevention for a DUI is not drinking and driving at all. Celebrate the holidays event free so you do not have to visit a DUI attorney.